Process of making tires for vehicles.



P. CLARE. PROCESS OF MAKING-TIRES VEHICLES. I Y AIfPLICATION FILED JUNE1'5. 1911. v 1 ,0'33,230, Patented July 23, 1912.

2 SHEETSSHEET 1.

W/ITHEEEES:

J. P. CLARE. PROCESS OF MAKING TIRES FOR VEHICLES.

APPLICATION FILED JUNE lfiflull.

Patented July 23, 1912.

2 SHEETS-$11331 2.

\X/ITFIEEEEE V cessively inflated,

unitrnn s'ra'rns PATENT OFFICE;

JAMES P. CLARE, OF STRATHAM, NEW HAMPSHIRE PROCESS OF MAKING; TIRES FOR VEHIGLESJ 7 in 's formin a art of this ,s ecitication v in explaining its nature.

The process comprising my invention relates to that type of tire having a body and inside said body one or more partitions which assist in the formation inside the body of the tire of a plurality of separate term.

inflatable compartments. Bythe tire as used herein and in the appended claims I wish to include either an inflated tire in the generally accepted meaning of the 7 term, or the inflatable inner portion thereof usually referred to as the inner tube espeolally where such is made a removable part and is contained within a protecting and retaining envelop or case.

' A tube or tire of this kind necessarily involves in its making the formation of joints. The making of these joints is a very important item in the formation of the tire for in order to stand the strain which must necessarily at times come upon the joints during the inflation of the several compartments it is necessary that the joints be very strong and ver'y'carefu'lly made. This means that the part or parts forming the body of the tire and partition or partitions must be brought together and united with especial care prior to vulcanizing. To do this the tire must be such that easy accessibility will be had to the points where the several joints are made durmg the formation of the tire in order that it may be seen when the parts are properly combined and brought together preparatory to vulcanizing. In order to secure strength and easy flexibility it is de sirabile that the partitions combine integrally with the body of the tire and that the joints be formed in the body of the tire outside the partitions, for if the partitions be jointed to the body the thickening of the partitions at the points of the joints is apt to interfere withtheir proper movement and cause undue stress upon the joints as the compartments of the Specification of Letters Patent.

Application filed June 15,

tubeor tire are st1c-' Patented July 23, 1912.

1911. Serial no. 633,362.

It is accordingly the objectof my invention to provide a tire possessing the capabilities above referred to and especially one in which easy access is bad to the joints for inspecting the same during the initial formation of the tube or tire preparatory to vulcanizing.

My invention stood by reference to the drawings in 'which i Figure lshows a portion of the tube or can best be seen and undertire in side elevation. Figs. 2, 3 and 4 are,

sections showing, respectively, the various compartments of the tube or tire and inanner of forming and inflating the'same. Fig. 5 shows in cross section a mandrel and a sheet of rubber wound thereon for illustratQ ing the manner in which-a tube or tire eni- "bodying my invention is formed. Fig. 6 shows substantially thesame asFig. 5 excepting, that the tube or tire is'formed in a slightly modified manner, to which special reference will hereinafter be made. Referring to the drawings ;1. represents the exterior or body of the tire; 2 and 3' 0 therespective partitions inside said body.'

Both the body of the tire and the partitions; are made of rubber'or other suitable ma- 7 terial. The body of the tire is made to assume asubstantially tubular form when the tire is completed and the separate par titions both extend from the opposite interior sides of the body of the tire of which vthey form an integral part as will. be hereinafter'ciqilained. They are so arranged as to form with one another and the body of the tire (the three separate inflatable com partments 4, 5 and 6, the infiation'of any one of which operates to effect a proper; infiation of the tire. 7 I

As may be seen by reference to Figs. 2, 3 and 4, the separate compartments are obtained by moving the partitions within-'- the body of the tire, either one or both partitions being capable of beingmoved outwardly in either direction against the interior of said body when any one ofsaid compartments is inflated. In order that no undue strain may come upon the partitions at such time they unite withi he body of the tire at points substantially opposite one ahothcr at about the diametrical center. of said body when the tire is inflated and the partitions are of such size or degree of looseness as will enable each one of them to assume a position conformatory with the interior side of the body against which it is moved.

Attention has already been. directed to thefact that the body of the tire and partitions sheet so that it will overlap the edge I). The

overlapping portion of'fhe sheet is secured to that portion thereof just adjacent the edge b by a joint 6. The overlapping portiorr of the sheet is then further wrapped around i the mandrel and portion (Z of the sheet thereon by an overlapping portion f which exthereof by a joint tends to a point diametrically opposite the joint where the overlapping portion f of the sheet issecurcd to the lapped portion (I hy a joint g. 'lh'eoverlapping portion of the sheet is then continued from the joint 9 further around the mandrel and portion of the sheet (Z thereonby an overlapping portion h which extends to a point adjacent the joint e where the overlapping portion h of the sheet is secured to the lapped portion The portion (Z of the sheet forms the two partitions 2 and 3, while the portions and h of the sheet form the body 1 of the tire. The joints 6, g and are made by bringing those overlapping portions of the sheet which form the respective joints into contact with one another and then vulcanizing' As is customary in thc formation of all tires,

the sheet from whichthe tires are formed is preparatory to vulcanizing of such consistency that when any part thereof is brought into contact with another part it will stick and a joint be formed when the sheet is vulcanized. So in the present case the joints are initially formed by bringing the overlapping portions of the sheet into contact with the lapped portions thereof at the points where the joints are to be formed, the other overlapping portions of the sheet being kept from adhering to the lapped portions thereof by the interposition of any in sulating sheet material 02 such as certain kinds ofpaper, as is well known to-those skilled in the art. Q

The joints are successively formed as the sheet is progressively wrapped aroundthe mandrel and accordingly immediate access is had to each successive joint and one is enabled to ascertain whether a properinitial bond is formed between the parts for formin the respectivejoints rior tovulcanizing. A or vulcanizing the orrned sheet is rcmoved from the mandrel the pieces 02 removed, the formed sheet cut into proper lengths and the ends of the cut lengths brought together and united as is customary in the formation of any tire.

In Fig. 6 a slightly modified method of forming the tire is shown although the ultimate construction of the tire is substantially the'same as before described. By reference to- Fig. 5 it will beseen that the sheet of rubber a from which the body of the'tire and partitions are formed is of a single thickness of quite thick rubber, 'while in Fig. 6 the parts of the tire are all formed of a double thickness of rubber, or, iii other which is anadv/antage as it tends to cure the sheet. a in Fig.v 6 represents the'sheet of rubber of w hich b and represent its respective ends From the point of its end 6 the sheet i. mandrel a: a d the successive wra-ppings made to adhere to one another forming the part The wrapping of the sheet isfthen continned around the mandrel and part d from a point e by an overlapping'part f which extends over a sheet of insulating material .71 interposed between the part f and the part (Z. This insulating material extends, however, only about half way around the mandrel or from the point 0 to a point diametrically opposite this point where the overlapping part f of the sheet is made to [adhere to the side of the part d forming a ljoint 9 From the joint 9 the sheet is further extended by a part. it passed around the mandrel over an insulating sheet as which is placed around the mandrel over the part d between the joint 9 joint where the sheet laps onto the part d and is joined thereto just adj acentth'e point a. The sheet is then again wrapped entirely around the mandrel over the parts ft ing these parts by such adherence. The parts (5, f and hof Fig. 6 corres ond with the parts (Z, and h of Fig. 5 an likewise form the body and partitions of the tire as before described. i

The separate inflatable compartments 4, 5. and 6 may be inflated by any suitable provided with a stem 7 which is affixed to the body of the tire by meansof clampsS and 9, respectively, the clamp .8 being arbody of the tire or within the compartment 6 and the clamp 9 arranged on the outside of stem in place. The body of the tire at the oint of the stem is preferably reinforced y a patch 10 applied thereto. This patch may be applied to the body of the tire when any defects that unay exist in any portion of wrapped twice around the means of inflation. I-have shown the tire the body to bear against it for holding thewords, two layers of relatively thin rubber and a point 2' diametrically opposite the and [L1 and made to adhere thereto reinforcranged on the end of the stein inside the '1t is formed and prior to vulcanizing in order that all parts of the tire requiring may be vulcanized at the same time. r a

Connecting with the interior of the stem 1 the stem and leading into the various compartments are controlled alt the point of the stem by any suitablevalvular mechanism inside said stem or such as I have shown 'and described in my application for Letters Patent of the United States filed June 15, 1911 Serial No. 633,361, which permits air to be compressed in any one of the compartments -forinflating 'the -"tire independently of the other compartments.- In practice the compartment 4-isfirst inflated. and then the compartments fraud 6 in, succession as punctures occur as described 1n said apphcatlon. .JHavmg thusfully'des'cribed my inventlon,

I claim and desire to secure by Letters Patent the U11ited"-States:' y The process" of-linitially. forming a tire preparatory to -yulcanizing, which tire has,

a body and inside said body separate inflatable compartments, consisting in. Wrapping asheetof rubber-into theform of a tube and then continuing the wrapping of the sheet around the tube in the forn pf a portion or portions which lap'around and. over the tube and luniting the overlapping portion or porsitesides of-said tube.

JAMES P. CLARE. Y

Witnesses: w 4

Jnsrnn R. SWAIN, GEORGE W. RAM).

' tions of the, sheet to the tubegonly on op-po- 

